Process for incorporation of metalcompounds into textiles



Patented Feb. 20, 1934 PATENT OFFICE PROCESS FOR INCORPORATION OF METAL- COMPOUNDS INTO TEXTILES Franz Hoelkeskamp, Vtuppertal-Wichlingl1ausen,

Germany, assignor to the firm American Bemberg Corporation, New York, N. Y., a corporation of Delaware No Drawing.

Application December 16, 1931,

Serial No. 581,504, and in Germany December 8 Claims.

This invention relates to a process for incorporating metal compounds in textile materials, more particularly in those textile materials which are capable of swelling, either for the purpose of conferring covering capability to the filaments or for producing, a special effect such as for example, resistance to water or the like.

It is known to treat textiles with aluminium salts, more particularly salts of organic acids, in order to render the same water-proof. This treatment is either carried out alone or in com bination with a soaping treatment, so that after the drying the material treated contains either finely divided alumina or a coating of fatty acid salts of aluminium.

This method of treatment possesses certain disadvantages since the precipitates'deposited on the material are not very uniform. These nonuniformities show themselves 'on a fabric, for

2O example, in the form of cloudiness and may render the fabric Worthless. Furthermore, the precipitate deposited is not particularly stable, particularly during washing operations, so that the effect produced subsides after a short time.

The subject of the present invention is a novel process for incorporating metal oxides in textiles of the most varied kind, more particularly those of fibres or filaments which are capable of swelling. According to the invention the treatment baths contain aqueous solutions of com=- pounds which contain complex metal oxide ammonia compounds and oxides of amphoteric metals, i. e. metal ammonia salts of acids which are derived from oxides of amphoteric metals. The material is treated with these baths, preferably while heating is uniformly pressed or squeezed out and then, again preferably under the action of heat, dried.

A simultaneous or subsequent treatment with 40 fats, waxes or resins in dissolved, saponified, or I emulsified form enhances the desired effect and improves more particularly the feel of the treated wares.

During the drying the ammonia volatilizes and a mixture of oxides remains behind in the fibre which in the first place-weights the fibre to a certain extent, and consequently imparts covering capability to it, and, in certain circumstances, makes the treated material water-proof chosen. I i J The process is of universal application since by choosing suitable metal oxides the most vaor fire-proof when the oxides have beensuitablyin a bath and the capability of the bath of completely penetrating the material being treated. A further advantage consists in the fact that the metal oxides are deposited in a form of maximum subdivision. However, the fact that no acid is liberated during the production of the metal precipitates and cannot form a salt,- which might be harmful to the material, by interaction, also appears to be of very considerable advantage. The precipitates deposited according to the invention separate out in extremely fine form and are extraordinarily stable to the influence of weathering and washing so that their action is long maintained. The process is explained below with reference to some specific examples, but it must be understood that the scope of the invention is in no way limited to the specific examples given.

(1.) Nickel nitrate or sulphate is precipitated with caustic soda, and the hydroxide obtained repeatedly Washed until the drainings no longer contain alkali. The nickel hydroxide, filtered in the pump, is covered with concentrated ammonia and allowed to stand for a prolonged time. The supernatant solution, which contains nickel hexamine hydroxide, is then decanted off into a vessel containing aluminium borings, or aluminiumpowder. The aluminium reacts with the nickel complex base and forms nickel hexammine aluminate. On completion of the reaction the alu minate, which is ready for weighting purposes is decanted off.

In order to effect the weighting, the textiles are treated for a short time with this solution, then rung out or centrifuged, and dried at about IG-.

, (2.) Nickel hexammine hydroxide is prepared as described in Example 1 and zinc hydroxide is dissolved therein. The weighting is effected as described in Example 1.

(3.) A concentrated solution of copper tetrammine hydroxide is prepared in the known manner from copper'sulphate, caustic soda and ammonia, and the solution is treated with aluminium powder; For weighting materials the aluminate solution is diluted preferably threefold in order to decrease its solvent capacity for cellulose. The impregnation is effected as described in Examples 1 and 2. 7

(4.) Zinc tetrammine aluminate is prepared,

and the textiles are treated with it as described in Examples 1 to 3.

What I claim is:

1. In a process for incorporating metal oxides in textiles, the steps of saturating thetextile to be treated with a metallic oxide-ammonia compound in aqueous solution and then drying the textile at temperatures of about to C. to volatilize the ammonia while simultaneously retaim'ng said metal oxide in said textile.

2; The process as set forth in claim 1, in which the material is saturated with an aqueous solution of a metallic amine-aluminate.

3. In a process for incorporating metal oxides in textiles, the steps comprising saturating the textile with a metallic oxide-ammonia 'compound in aqueous solution, drying the textile at temperatures of about '70 to 80 C. to volatilize the ammonia while retaining said metal oxide in said textile and simultaneously treating the impregnated textile with saponified substances of the group consisting of fats, waxes and resins.

4. In a process for treating textiles the step of immersing them in a bath containing nickel hexamine aluminate, then removing the textile from the bath and drying it at from about 70 to 80 n ckel hexamine aluminate, then removing the' textile from the bath and drying it at from about 70lto 80 C.

7. In a process for treating textiles, the steps of immersing them in a bath containing a metallic hexamine zincate, then removing the textile from the bath and drying it at from about 70 to 80 C.

' 8. In the treatment of textiles, the step of immersing the same in a bath containing copper tetramine hydroxide which has been treated with aluminum powder, then removing thetextile from the bath and drying it at from about 70 to 80 C.

FRANZ HOELKESKAMIP. 

